Mine came right after I ordered them, that guy is quick!
He told me he didn't think I needed the velcro so I took his advice, I also bought one of his cooler covers. It hasn't been too warm here lately, I hope to get to test these Gizmos out soon, I'll post some pics when I do!

We put Velcro under the roof end, three pieces on each end, self-adhesive industrial weight. We discovered one of the hook pieces had stayed attached to the PUG when we took them off the last time. [I followed the usual Velcro habit most sew-ers use, which is that the plush part goes on the side that will point toward the body, or in this case, on the part we will be handling.] We may end up stapling the hook part to the pup.
Dealing with all those shock cord ends, which is very worth it for stability of the PUGs, got old for me really fast. This is what we're trying for this season:new gizmo set-up by kitphantom, on Flickr
The shock cords will stay attached to the rings, which might also reduce tangling as we fold and put them away. (We don't have enough space to leave them on the bunk end, we sacrificed that for memory foam mattress toppers.)